Electromagnetic transient testing

Electromagnetic transient testing

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In this brief introduction to the nature of transients and disturbance to power distribution systems it has only been possible to acquaint the reader with the broad categories of effects and show some examples of applicable standards and specifications. With the fast growing implementation of digital microprocessors into industrial, commercial and domestic equipment this area of electromagnetic compatibility is becoming very much more important than it has been in the past. Consequently, EMC design and test engineers must be aware of this somewhat overlooked aspect of electromagnetic interference engineering, and not allow an otherwise compatible equipment to be compromised by these conducted transients and other power line phenomena.

Chapter Contents:

  • 10.1 Introduction
  • 10.1.1 Transient types
  • 10.1.2 Continuous and transient signals
  • 10.2 Fourier transforms
  • 10.2.1 Introduction
  • 10.2.2 The transform
  • 10.2.3 Introducing phase
  • 10.2.4 Fourier transform expressions
  • 10.2.5 Impulse response
  • 10.2.6 Convolution
  • 10.2.7 Advantages of time-domain manipulation
  • 10.3 ESD-electrostatic discharge
  • 10.3.1 Introduction
  • 10.3.2 The ESD event
  • 10.3.3 Types of ESD
  • 10.3.4 ESD-induced latent defects
  • 10.3.5 Types of ESD test
  • 10.3.6 Number of discharges per test
  • 10.3.7 ESD test voltage levels
  • 10.3.8 Assessing EUT performance
  • 10.4 Nuclear electromagnetic pulse
  • 10.4.1 Introduction
  • 10.4.2 Types of NEMP
  • 10.4.3 Exoatmospheric pulse generation
  • 10.4.4 NEMP induced currents
  • 10.4.5 NEMP testing
  • 10.5 Lightning impulses
  • 10.5.1 Lightening environment
  • 10.5.2 Defining the discharge
  • 10.5.3 Effects on equipment
  • 10.6 transients and general power disturbances
  • 10.6.1 Importance of power transients
  • 10.6.2 examples of power supply immunity standards
  • 10.6.3 Summary
  • 10.7 References

Inspec keywords: power cables; power distribution faults; electromagnetic compatibility

Other keywords: domestic equipment; digital microprocessor; electromagnetic interference; electromagnetic compatibility; EMC design; power distribution system

Subjects: Distribution networks

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